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圓繞圓外
Author:
purespirit0301
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
錐體建築師
異分母分數減法
兩位數除以一位數（二）
Discover Resources
梯形
三角函數
蜘蛛網
伸縮變換的副本
频率分布直方图与箱线图
Discover Topics
Quadrilaterals
Stochastic Process or Random Process
Translation
Arithmetic Operations
Rotation